Is Q02 a billable ICD-10-CM code?

Yes. Q02 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does Q02 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the nervous system (Q00-Q07).

What cannot be coded together with Q02?

Q02 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

Q02

Q02 — Microcephaly

Billable / specific codeICD-10-CMPOA exempt

Q02 is a billable, specific ICD-10-CM code for microcephaly. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

Meckel-Gruber syndrome (Q61.9)

Code first

The underlying condition must be sequenced before this code.

, if applicable, congenital Zika virus disease

Includes

Conditions this code covers.

hydromicrocephaly
micrencephalon

Other codes that can never be billed with Q02

These codes carry an Excludes1 note pointing at Q02. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q02 alone.

Q75Other congenital malformations of skull and face bones

Risk adjustment

Q02 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 182 Spinal Cord Disorders/Injuries0.478 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

Q02 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54111Billing and Coding: Speech Language Pathology (SLP) Services: Communication Disorders
A56612Billing and Coding: CT of the Head
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

How Q02 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to Q02.

Hydromicrocephaly
Micrencephalon, micrencephaly
Microcephalus, microcephalic, microcephaly
Microencephalon
Oligoencephalon
Hypoplasia, hypoplastic›brain
Hypoplasia, hypoplastic›cephalic
Idiot, idiocy›microcephalic
Nondevelopment›brain
Undeveloped, undevelopment›brain(congenital)
Undeveloped, undevelopment›cerebral(congenital)
Absence›skull bone›with›microcephaly

Questions about Q02

Is Q02 a billable ICD-10-CM code?: Yes. Q02 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does Q02 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the nervous system (Q00-Q07).
What cannot be coded together with Q02?: Q02 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.